A red blood cell is placed into each of the following solutions. Indicate whether crenation, hemolysis, or neither will occur. Solution A: 2.37 % (m/v) NaCl Solution B: 0.59 % (m/v) glucose Solution C: distilled H2O Solution D: 9.39 % (m/v) glucose Solution E: 5.0% (m/v) glucose and 0.9% (m/v) NaCl

A: 2.37 % (m/v) NaCl Solution: crenation.

B: 0.59 % (m/v) glucose Solution: hemolysis.

C: distilled H2O Solution: hemolysis.

D: 9.39 % (m/v) glucose Solution: crenation.

E: 5.0% (m/v) glucose and 0.9% (m/v) NaCl: neither.

Explanation:

A red blood cell should be placed in an isotonic solution to avoid crenation or hemolysis. An isotonic solution has the same solute concentration as the one in the interior of the cell. As a result, the solvent does not have to move toward the place with a higher solute concentration to balance it.

When the red blood cell is in a solution that has a higher concentration of solutes than the one inside the cell, in other words, the cell is in a hypertonic solution. The solvent will flow from the cell to the solution causing a crenation of the cell.

When the red blood cell is in a solution with a lower solute concentration than the one inside the cell, also known as a hypotonic solution. The solvent will flow from the outside to the inside of the cell. As a result, the cell suffers hemolysis.

The isotonic solution for the cell should be 5.0% (m/v) glucose and 0.9% (m/v) NaCl, to avoid crenation or hemolysis.